Service difficulty report · Angle · Boeing 7378H4

Difficulty date
March 7, 2023
Submitted
April 13, 2023
Operation
Air carrier
Aircraft
N8527Q
Make and model
Boeing 7378H4
Aircraft serial
36946
Aircraft time
20,252 hours, 9,861 cycles
Part
Angle
Condition
Cracked
Location
Zn 100 Fus Lower
Stage of operation
IN
How discovered
9
Nature of condition
O
Precautionary procedure
K

As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.

What was found

R/H BS663 UPPER ATTACH ANGLE IS CRACKED ON VAPOR BARRIER RBL8 WL167.68<[01] INSTALLED EWIS PROTECTION ON FWD AND AFT SIDE OF VAPOR BARRIER BS663 UPPER ATTACH ANGLE RBL8-RBL20 WL167.68 IAW AMM 20-60-07-913-801.;[02] REMOVED DAMAGED SECTION OF RH BS663 VAPOR BARRIER UPPER ATTACH ANGLE RBL8-RBL20 WL167.68 IAW SRM 57-10-10-2R-5.;[03] PERFORM AN OPEN HOLE HIGH FREQUENCY EDDY CURRENT (HFEC) INSPECTION FOR ALL INITIAL FASTENER HOLES IN THE REPAIR AREA TO MAKE SURE THERE IS NO DAMAGE WITHIN THE REPAIR AREA.;[04] PERFORM A DETAILED INSPECTION OF THE REPAIR AREA AND THE UNDERLYING STRUCTURE TO MAKE SURE THAT THERE IS NO DAMAGE WITHIN THE REPAIR AREA.;[05] RECEIVED REPAIR PARTS FOR BS663 VAPOR BARRIER UPPER ATTACH ANGLE RBL8-RBL20 WL167.68: SPLICE ANGLE RO#908952-SWA REPLACEMENT ANGLE RO#908953-SWA.[09] REPAIR FASTENERS COMMON TO INTERNAL SURFACE CENTER FUEL TANK WILL BE CAP SEALED AND LEAK CHECKED ON FAULT. TTG8Q00JCW6U;[10] LOCATED; DRILLED; TRIMMED; DEBURRED; AND APPLIED CHEMICAL CONVERSION COATING @ RH BS663 VAPOR BARRIER UPPER ATTACH ANGLE RBL8-RBL20 WL167.68 IAW SRM 57-10-10-2R-5.;[11] VERIFIED CORRECTION ACTION ITEM 9 AND 10.;[12] APLLIED PRIMER ON REPAIR PARTS AND REPAIR AREA RBL8-RBL20 WL167.68 IAW SRM 57-10-10-2R-5. AND OK TO INSTALL.;[13] VERIFIED CORRECTIVE ACTION 12. OK TO INSTALL GIVEN;[14] INSTALLED REPAIR PARTS AT RBL8-RBL20 WL167.68 IAW SRM 57-10-10-2R-5.;

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